From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konstantin Khlebnikov Subject: [PATCH v1 0/7] mm/memcontrol: recharge mlocked pages Date: Wed, 04 Sep 2019 16:53:08 +0300 Message-ID: <156760509382.6560.17364256340940314860.stgit@buzz> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru; s=default; t=1567605189; bh=9NG/dDnFeKeZHp7gq4Bt3jk12l8IcLQ6rwdO1YD1xvQ=; h=Message-ID:Date:To:From:Subject:Cc; b=Ai2bzEbJdK+baGdRKLO3SHZG+trevrPdYggz78BEbE91uKDRhP/r9odOJkZ2Dga3G FRTz0fb1uTJTZwcwqMnA44/U1x/ocUIpHSlF7wqoKjKBtWlvjg/cs2pLxaO+QAOYKF ZnbqrmTnFEbaAXSvZhbTEvvJhjBU5YXvFV3SbSTs= Sender: linux-kernel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org Cc: Michal Hocko , Roman Gushchin , Johannes Weiner Currently mlock keeps pages in cgroups where they were accounted. This way one container could affect another if they share file cache. Typical case is writing (downloading) file in one container and then locking in another. After that first container cannot get rid of cache. Also removed cgroup stays pinned by these mlocked pages. This patchset implements recharging pages to cgroup of mlock user. There are three cases: * recharging at first mlock * recharging at munlock to any remaining mlock * recharging at 'culling' in reclaimer to any existing mlock To keep things simple recharging ignores memory limit. After that memory usage temporary could be higher than limit but cgroup will reclaim memory later or trigger oom, which is valid outcome when somebody mlock too much. --- Konstantin Khlebnikov (7): mm/memcontrol: move locking page out of mem_cgroup_move_account mm/memcontrol: add mem_cgroup_recharge mm/mlock: add vma argument for mlock_vma_page() mm/mlock: recharge memory accounting to first mlock user mm/mlock: recharge memory accounting to second mlock user at munlock mm/vmscan: allow changing page memory cgroup during reclaim mm/mlock: recharge mlocked pages at culling by vmscan Documentation/admin-guide/cgroup-v1/memory.rst | 5 + include/linux/memcontrol.h | 9 ++ include/linux/rmap.h | 3 - mm/gup.c | 2 mm/huge_memory.c | 4 - mm/internal.h | 6 + mm/ksm.c | 2 mm/memcontrol.c | 104 ++++++++++++++++-------- mm/migrate.c | 2 mm/mlock.c | 14 +++ mm/rmap.c | 5 + mm/vmscan.c | 17 ++-- 12 files changed, 121 insertions(+), 52 deletions(-) -- Signature